JUY-276 My wife's secret. She doesn't know what I know... Oda Makiko.

The brother of the husband, Kazuyuki, named Masayuki failed at work and lost everything, ending up staying for a while. The wife, Shinako, though bewildered, accepted her husband's proposal... Masayuki, who had been out of touch since his divorce, couldn't control his excitement just from knowing there was a woman under the same roof, despite knowing she was his brother's wife. Shinako, troubled by her adulterous relationship with her brother-in-law, lived in anxiety, fearing Kazuyuki might find out, but Kazuyuki continued to treat her as usual, whether he knew or not...